<!DOCTYPE html>
<html lang='en'>
<head>
    <meta charset='UTF-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <title>Document</title>
    <script src='../vue.js'></script>
</head>
<body>
    <div id='app'>
        <input type="text" v-model="search">
        <ul>
            <li v-for="item in newPerson" :key="item.id">
                {{item.name}}---{{item.age}}
            </li>
        </ul>
    </div>
    <script>
        /* 
        过滤的时候不要修改数据 而是得到一个新的值 保留数据
        */
        Vue.config.productionTip = false;
        const vm = new Vue({
            el:'#app',
            data(){
                return {
                search:'',
                person:[
                    {id:'001',name:'laowang',age:18},
                    {id:'002',name:'dawang',age:15},
                    {id:'003',name:'xiaowang',age:10},
                    {id:'004',name:'hang',age:19}
                ]
            }
            },
            computed:{
              newPerson(){
                // console.log(this.search);
                return this.person.filter((item)=>{
                    // console.log(item);
                    //this.search一开始上来的时候是空串
                    // 不管谁用includes检测空串都是为true
                    return item.name.includes(this.search)
                })
              }
            }
    })
    </script>
</body>
</html>